Logica - Query language

Logica is a query language created in 2020 by Evgeny Skvortsov.

#393on PLDB

4Years Old

Download source code:

git clone https://github.com/evgskv/logica

Logica is an open source declarative logic programming language for data manipulation. Logica is a successor to Yedalog, a language created at Google earlier.

Tags: queryLanguage
Logica is developed on GitHub and has 1,710 stars
Early development of Logica happened in https://github.com/EvgSkv/logica/issues
Logica compiles to SQL
Logica is written in Lex, Python, Jupyter Notebook, Markdown, JSON, HTML, YAML, JavaScript, Vim script, Protocol Buffers, CSS, CSV
logica.dev was registered in 2020

Example from the web:

# Define natural numbers from 1 to 29.
N(x) :- x in Range(30);
# Define primes.
Prime(prime: x) :-
  N(x),
  x > 1,
  ~(
    N(y),
    y > 1,
    y != x,
    Mod(x, y) == 0
  );

Language features

Feature	Supported	Example	Token
Comments	✓	# A comment
Line Comments	✓	# A comment	#
Semantic Indentation	X